4 ms·
> The professor told me that if he put the magnet down with the axis in the vertical direction and pulsed it with an iron nail standing under the magnet that th
by egfx 5y ago
> The professor told me that if he put the magnet down with the axis in the vertical direction and pulsed it with an iron nail standing under the magnet that the nail would reach escape velocity and never come back down to earth
Hmm that sounds suspiciously like the descriptions of the systems that are rumored to operate and power UFO’s. Research “electrogravitics”.
- egfx 5y agoTo all those downvoting. Do your due diligence first like I did ;)
- jodrellblank 5y agoCoil up some wire and run electricity through it, you get a magnetic field which can pull magnetic materials. That's an electromagnet, e.g. used in door locking systems, and lifting cars into car crushers. Instead of pulling on a car, fix some magnetic material to an axle and a ring of coils around it, the magnetic pulls make the axle turn, you have an electric motor. Have some freely moving magnetic material, and unroll the motor into a line of coils, and you can make a linear motor as used in a maglev train. Make the electric current pulses powerful enough, and the thing is fired away very fast, your linear motor becomes a rail gun. Make a huge pulse and make the thing small and light, and it could go fast enough to reach escape velocity from one coil. Handwavy estimates: An 8d nail weighs around 5 grams[1], it takes 28kWh to get 1kg past escape velocity[2], so about 150Wh into the nail might do it. Pump about 2 laptop batteries worth of energy into accelerating the nail between the moment it picks up off the ground, and the moment it exits the top of the coil travelling at several kilometers per sec - that's going to need a big setup with supercooling and high power capacitors because the time window is so short, not because it's using secret alien technology. It doesn't sound "suspiciously like gravity manipulation" at all? [1] at ~100 8d nails to the pound, and ~450grams to the pound, 1/100th of 450 makes 4.5grams, rounded up: https://www.treeisland.com/sites/default/files/documents/brochures-spec-sheets/Average%20nails%20per%20pound.pdf https://www.treeisland.com/sites/default/files/documents/bro... [2] https://space.stackexchange.com/questions/4330/how-much-energy-is-required-to-put-1-kg-in-leo https://space.stackexchange.com/questions/4330/how-much-ener...
- egfx 5y ago>It doesn't sound "suspiciously like gravity manipulation" at all? Try adding some rotary effects and then it may. You gotta think outside the globe.
- AnimalMuppet 5y agoCould you, like, give some actual detail, instead of making us try to guess what you have in mind? Because we're bored of that game...
- egfx 5y agosure not a problem. Parse through this document : https://patentimages.storage.googleapis.com/0e/5e/e0/eb08a31c44827a/US6974110.pdf https://patentimages.storage.googleapis.com/0e/5e/e0/eb08a31...
- AnimalMuppet 5y agoInteresting. Granted in December 2005. So in the intervening 15 1/2 years, has someone shown a working device? Can you point me to documentation of that?
- egfx 5y agoUmm I think you just answered your own question.
- jodrellblank 5y agoAh, Biefeld-Brown effect: https://en.wikipedia.org/wiki/Biefeld–Brown_effect https://en.wikipedia.org/wiki/Biefeld–Brown_effect
- egfx 5y agoYes. What about it? It’s interesting isn’t it?